Constellation Pharmaceuticals, Inc. announced the appointment of Keith E. Dionne, Ph.D., to the role of president and chief executive officer to succeed Mark A. Goldsmith, M.D., Ph.D., who will continue his involvement with the company as executive chairman of its board of directors. Dr. Goldsmith is returning to the west coast where he will join Constellation investor Third Rock Ventures as a venture partner in the firm's San Francisco office. Dr. Dionne joins company from Third Rock Ventures, where he served as an entrepreneur-in-residence. Previously, he served as CEO at Surface Logix, Inc.